diff --git a/logdoctor/tools/craphelp/craphelp.cpp b/logdoctor/tools/craphelp/craphelp.cpp
index 5638b529..442eb940 100644
--- a/logdoctor/tools/craphelp/craphelp.cpp
+++ b/logdoctor/tools/craphelp/craphelp.cpp
@@ -66,8 +66,8 @@ const std::unordered_map<std::string, QString> Craphelp::getColorScheme( const i
                       {"link", "#ff85a1"} };
 
         default:
-            // wrong
-            throw GenericException( "Unexpected ColorScheme ID: "+std::to_string( scheme_id ) );
+            // wrong, shouldn't be here
+            throw GenericException( "Unexpected ColorScheme ID: "+std::to_string( scheme_id ), true ); // leave un-catched
     }
 }
 
diff --git a/logdoctor/tools/craplog/modules/hash.cpp b/logdoctor/tools/craplog/modules/hash.cpp
index a92428a0..5c1f6c65 100644
--- a/logdoctor/tools/craplog/modules/hash.cpp
+++ b/logdoctor/tools/craplog/modules/hash.cpp
@@ -77,7 +77,7 @@ std::string HashOps::digestFile( const std::string& file_path )
             // try reading as gzip compressed file
             GZutils::readFile( file_path, content );
 
-        } catch (GenericException& e) {
+        } catch (const GenericException& e) {
             // failed closing file pointer
             throw e;
 
@@ -89,17 +89,27 @@ std::string HashOps::digestFile( const std::string& file_path )
             IOutils::readFile( file_path, content );
         }
 
-    } catch (GenericException& err) {
-        // failed closing
-        throw err;
+    // re-catched in craplog
+    } catch (const GenericException) {
+        // failed closing gzip file pointer
+        throw GenericException( QString("%1:\n%2").arg(
+            DialogSec::tr("An error accured while reading the gzipped file"),
+            QString::fromStdString( file_path )
+            ).toStdString() );
 
     } catch (const std::ios_base::failure& err) {
-        // failed reading
-        throw err;
+        // failed reading as text
+        throw GenericException( QString("%1:\n%2").arg(
+            DialogSec::tr("An error accured while reading the file"),
+            QString::fromStdString( file_path )
+            ).toStdString() );
 
     } catch (...) {
         // failed somehow
-        throw GenericException( "Something failed while handling file" );
+        throw GenericException( QString("%1:\n%2").arg(
+            DialogSec::tr("Something failed while handling the file"),
+            QString::fromStdString( file_path )
+            ).toStdString() );
     }
 
     SHA256 sha;
diff --git a/logdoctor/tools/crapnote/crapnote.cpp b/logdoctor/tools/crapnote/crapnote.cpp
index a0005539..147ce725 100644
--- a/logdoctor/tools/crapnote/crapnote.cpp
+++ b/logdoctor/tools/crapnote/crapnote.cpp
@@ -53,7 +53,7 @@ void Crapnote::setColorScheme( const int& scheme_id )
             break;
         default:
             // wrong
-            throw GenericException( "Unexpected ColorScheme ID for Crapnote: "+std::to_string( scheme_id ) );
+            throw GenericException( "Unexpected ColorScheme ID for Crapnote: "+std::to_string( scheme_id ), true ); // leave un-catched
     }
 }
 
diff --git a/logdoctor/tools/crapview/modules/query.cpp b/logdoctor/tools/crapview/modules/query.cpp
index 390c2096..01d83681 100644
--- a/logdoctor/tools/crapview/modules/query.cpp
+++ b/logdoctor/tools/crapview/modules/query.cpp
@@ -35,7 +35,7 @@ const int DbQuery::getMinuteGap( const int& minute , const int& gap )
     int m = -1;
     if ( minute < 0 || minute >= 60 ) {
         // unexpected value
-        throw GenericException( "Unexpected Minute: "+std::to_string( minute ) );
+        throw DateTimeException( "Unexpected Minute: "+std::to_string( minute ) );
     }
     int n = 0;
     for ( int g=0; g<60; g+=gap ) {
@@ -81,7 +81,7 @@ const int DbQuery::getMonthsCount( const QString& from_year, const QString& from
         to_month_ = ( to_month.size() == 0 ) ? from_month_ : this->getMonthNumber( to_month ) ;
     } catch (...) {
         // failed to convert to integers
-        throw GenericException( "Failed to convert from string to int" );
+        throw DateTimeException( "Failed to convert from string to int" ); // leave un-catched
     }
     return this->getMonthsCount( from_year_, from_month_, to_year_, to_month_ );
 }
diff --git a/logdoctor/utilities/io.cpp b/logdoctor/utilities/io.cpp
index bcdc0560..87a18519 100644
--- a/logdoctor/utilities/io.cpp
+++ b/logdoctor/utilities/io.cpp
@@ -138,7 +138,7 @@ void IOutils::randomLines(const std::string& path, std::vector<std::string>& lin
             // try reading a gzipped file
             GZutils::readFile( path, aux );
 
-        } catch (GenericException& e) {
+        } catch (const GenericException& e) {
             // failed closing file pointer
             throw e;
 
@@ -181,21 +181,30 @@ void IOutils::randomLines(const std::string& path, std::vector<std::string>& lin
             }
         }
         aux_lines.clear();
-    } catch (const std::ios_base::failure& err) {
+
+    // re-catched in craplog
+    } catch (const GenericException) {
+        // failed closing gzip file pointer
+        lines.clear(); aux_lines.clear();
+        if ( file.is_open() ) {
+            file.close();
+        }
+        throw GenericException( "An error accured while reading the gzipped file" );
+
+    } catch (const std::ios_base::failure) {
         // failed reading
-        lines.clear();
-        aux_lines.clear();
+        lines.clear(); aux_lines.clear();
         if ( file.is_open() ) {
             file.close();
         }
-        throw err;
+        throw GenericException( "An error accured while reading the file" );
+
     } catch (...) {
-        lines.clear();
-        aux_lines.clear();
+        lines.clear(); aux_lines.clear();
         if ( file.is_open() ) {
             file.close();
         }
-        throw std::exception(); // exception catched in Craplog
+        throw GenericException( "Something failed while handling the file" );
     }
     if ( file.is_open() ) {
         file.close();
@@ -209,7 +218,7 @@ void IOutils::readFile( const std::string& path , std::string& content )
     // read the whole file
     std::ifstream file;
     try {
-        constexpr std::size_t read_size = std::size_t(4096);
+        /*constexpr std::size_t read_size = std::size_t(4096);*/
         file = std::ifstream(path);
         if ( ! file.is_open() ) {
             throw std::ios_base::failure( "file is not open" );